Corrosion processes in the compressor and turbine section of a gas turbine are basically different and are treated separately. The subject of this first paper is the compressor section.

Firstly, the conditions controlling the corrosion behaviour in the compressor are considered. Next the different forms of corrosion in compressors and the various methods to combat these corrosion processes are considered. Special attention is paid to:

•rinsing and washing

•the properties of protective coatings with regard to corrosion and erosion.

Corrosion processes in the turbine section are discussed in part II.

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